Several security issues were fixed in Squid.
It was discovered that Squid incorrectly handled Digest authentication. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2019-12525)
18 July 2019
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Squid.
It was discovered that Squid incorrectly handled Digest authentication. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2019-12525)
It was discovered that Squid incorrectly handled Basic authentication. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 19.04. (CVE-2019-12527)
It was discovered that Squid incorrectly handled Basic authentication. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2019-12529)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.